Indian police officers stand guard at a police check point in the central Connaught Place area of New Delhi, India, Monday, Sept. 20. Police said they have increased patrols across New Delhi a day after unidentified gunmen shot and wounded two tourists, raising concerns about security less than two weeks before an international sporting event in the Indian capital.

Gurinder Osan/AP Photo

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• A daily summary of global reports on security issues.

A driveby shooting Sunday in Delhi injured two Taiwanese tourists, putting the capital and Mumbai on red alert and also raising concerns about terrorist attacks during the 72-nation Commonwealth Games next month.

The attack took place outside the Jama Masjid, Delhi's primary mosque, on Sunday when a pair of men on a motorcycle opened fire at a tourist bus, injuring two Taiwanese nationals, reports CNN. One remains in critical condition, while the other is expected to be discharged from the hospital soon.

Some three hours after the attack, a car exploded in the same area, apparently due to a bomb made from a pressure cooker, reports The Asian Age. The bomb caused no injuries. It remains unclear whether the bomb was connected to the shooting.

The British High Commission in Delhi said, according to the Times of India, "There is a high threat from terrorism throughout India. Terrorists have targeted places in the past which Westerners are known to visit, including public places such as restaurants, hotels, railway stations, markets and places of worship."

BBC News reports that its BBC Hindi branch received a terrorist threat against the Commonwealth Games from the Indian mujahideen, a native terrorist group responsible for a string of bombings in India. The group's statement threatened attacks against the games in response to the recent killings of Muslims in Kashmir.

"On the one hand, Muslim blood is flowing like water while on the other hand you are preparing for the festival of Games," it read.

The statement made no reference to Sunday's attack, but AFP quoted another it had received from the same group saying it had carried out the shootings. It repeated the threat to the Games.

But Agence France-Presse gives reason to doubt that Islamic terrorists were responsible for Sunday's attack, which seemed to target the Jama Masjid mosque.

Observers said Islamists were unlikely to attack India's most famous Muslim place of worship. The imam of the 17th-century Jama Masjid, Syed Ahmed Bukhari, told AFP the attackers had shot directly at the mosque.

Some speculated that the attack may have been the work of Hindu zealots ahead of a court ruling Friday on a disputed religious site.